# Error opening FB4 project in FB5

**URL:** https://www.finalbuilder.com/forums/t/error-opening-fb4-project-in-fb5/2740
**Category:** Bugs
**Created:** [December 19, 2006, 8:02am UTC](https://www.finalbuilder.com/forums/t/error-opening-fb4-project-in-fb5/2740 "2006-12-19T08:02:39Z")
**Posts on this page:** 3
**Page:** 1

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### Author: ![deleted\_user](https://www.finalbuilder.com/forums/user_avatar/www.finalbuilder.com/deleted_user/32/937_2.png) [@deleted\_user](https://www.finalbuilder.com/forums/u/deleted_user)
#### Post date: [December 19, 2006, 8:02am UTC](https://www.finalbuilder.com/forums/t/error-opening-fb4-project-in-fb5/2740/1 "2006-12-19T08:02:39Z")

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posting this here first.  
  
we just installed FB5 - we couldn't earlier due to the development phases we were experiencing.  
  
i went to open an FB4 project and received the following error:  
  
**Unable to load project.  
Error: Unable to read log file: Could not upgrade table index :**

**NexusDB: : Query execution failed:  
NexesDB: Index does not exist. [$270D/9997][$270D/9997]**  
  
i have a feeling that i'll be contacting my support person for this but was wondering if this is something others have seen.

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### Author: ![angus](https://www.finalbuilder.com/forums/letter_avatar_proxy/v4/letter/a/b3f665/32.png) [@angus](https://www.finalbuilder.com/forums/u/angus)
#### Post date: [December 19, 2006, 11:27am UTC](https://www.finalbuilder.com/forums/t/error-opening-fb4-project-in-fb5/2740/2 "2006-12-19T11:27:22Z")

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Hi David,  
  
Could you please send the .fbl4 and/or .fbl5 log files to [support@finalbuilder.com](mailto:support@finalbuilder.com). We’ll try and work out what went wrong during the upgrade process.  
  
If you then delete and/or move the log file(s) then you should be able to use the project as usual.  
  
Regards,  
  
Angus

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### Author: ![tate](https://www.finalbuilder.com/forums/letter_avatar_proxy/v4/letter/t/e19b73/32.png) [@tate](https://www.finalbuilder.com/forums/u/tate)
#### Post date: [December 20, 2006, 1:54am UTC](https://www.finalbuilder.com/forums/t/error-opening-fb4-project-in-fb5/2740/3 "2006-12-20T01:54:05Z")

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btw David, can you tell us both the FB4 and FB5 versions you were using please?  
  
.t8